Fan-blower wheel



(No M0881.)l

I' W. D. SMITH.

PAN BLUWER WHEEL.

180.295.448. Patented Mar. 18,1884.

#if 6,55*/ F11/*enfers Y fab/Milw- WM UNITED STATES PATENT OFFICE.

WRIGHT D. sMITH, oEDETEoI'T, MICHIGAN.

FAN-BLOWER WH Eel..

SPECIFICATION forming part of Letters Patent No. 295,449, dated March 18, 1884.

Application iled June 27, 1883. (No model.)

being had to the accompanying drawing,which forms a part of this specication.

This invention relates to certain new and useful improvements in the construction of wheels for fan-blowers; and it consists in the peculiar` construction of such fan blower wheels and the combination of the various parts, all as more fully hereinafter` set forth and claimed. I

In the accompanying drawing, which forms a part of this specification, myimproved fanblowerwheel is shown in perspective, in which Arepresents the hub of a'wheel, which is `designed to be rigidly secured upon a shaft within the fan-case, as in the ordinary manner. This hub A is provided With curved radial projecting arms B, which are cast with and form an integral part of the hub, and have on their outer ends expanded flanges b.

C represents theblades, which are made of any suitable material, and are constructed substantially in the form shown, the inner ends or bases of which being in width about equal to the `joint Width of the base of the arms B and the flanges a a at each side of said arms. These blades are made to conform to the curvature of such arms, and are rigidly secured by 3 5 bolts or otherwise upon them, all the arms and blades being curved in the same degree and direction. 'Ihe blades have their\bases riv I eted or otherwise secured to the flanges a a,

which are cast with the hub and arms, and thus serve not only as a means of securing the inner ends of the arms, but to strengthen the latter at their junction With the hub.

While I have described the arms of the hub as being curved, it is evident that they :may 45 be Inade straight without departing from the spirit of my invention.

I deem it important that the outer ends of the arms B should be provided with expanded anges, as shown, for by this construction I am enabled to make a stronger blade of lighter material than has heretofore been used, .the flanges supporting and strengthening the blades and preventing the same from being twisted or broken off.

What I claim as nlyinvention is- A fanfblower Wheel consisting of the hub A, provided with the radial arms B, having expanded anges b at their outer ends and anges 'a at the hub, all cast integral there` with, and radial blades C, provided With curved edges, substantially as set forth.

IVRIGH'I D.. SMITH.

IVitnesses:

M. C. HUYET'I, H. S. SPRAGUE, E. SOULLY. 

